Under the unifying umbrella of a general result of Penrose and
Yukich (Annals of Applied Probability 13 (2003),
277-303) we give laws of large numbers (in the Lp sense) for
the total power-weighted length of several nearest-neighbour-type
graphs on random point sets in ℝd, d ∈ ℕ. Some of these
results are known; some are new. We give limiting constants
explicitly, where previously they have been evaluated in less
generality or not at all. The graphs we consider include the
k-nearest-neighbours graph, the Gabriel graph, the minimal
directed spanning forest, and the on-line nearest-neighbour graph.
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